Pentair 5TMH-250, 5TMH-75, 5TMH-375, 5TMH-425, 6TMH-140 Owner's/operator's Manual

Owner’s/Operator’s Manual

TMH Series

Submersible

READ AND FOLLOW SAFETY

INSTRUCTIONS!

This is the safety alert symbol. When you see this
symbol on your pump or in this manual, be alert to the

potential for personal injury.

warns about hazards that will cause serious

personal injury, death or major property damage if ignored.

personal injury, death or major property damage if ignored.

minor personal injury or property damage if ignored.

NOTICE indicates special instructions which are important
but not related to hazards.

Carefully read and follow all safety instructions in this manual
and on pump.

Keep safety labels in good condition. Replace missing or
damaged safety labels.

California Proposition 65 Warning

chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm.

warns about hazards that can cause serious

warns about hazards that will or can cause

This product and related accessories contain

Turbine

INSTALLATION / OPERATION

MAINTENANCE

Table of Contents:

Safety ................................................................1

General Considerations ....................................1

Specifications ....................................................2

Pre-Installation Procedures ...........................2-3

Installation .........................................................3

Submergence ................................................3-4

Three-Phase Current Unbalance ...................4-5

Service ..............................................................5

Electrical Tests .................................................6

Pump / Motor Separation ..................................6

Pump Disassembly ...........................................6

Pump Inspection / Maintenance .......................7

Preventive Maintenance ...................................7

Pump Assembly .............................................8-9

Repair Parts ....................................................10

Troubleshooting ..............................................11

Warranty .........................................................12

BE972 (Rev. 05/25/16)

GENERAL CONSIDERATIONS

Before installing your submersible turbine pump, review the
following:

Clear well of sand and abrasive material before installing
pump. Abrasive materials in the water cause component

wear and reduce pump capacity and discharge pressure.
Never use the pump to develop or clean the well. Permanent
pump damage can result within the first few hours of
operation.

Align well casing. If the well casing is suspected of being
crooked, check it with a gauge of identical length and
diameter as the pump and motor with two lengths of pipe
attached. Serious dam age can result if the pump becomes
lodged in a crooked casing.

Be sure the well can supply a high-capacity turbine
pump. The well should be deep enough to cover the pump

unit with water, even at extreme pumping rates. Typically, the
pump should be submerged 10 to 20 feet below the lowest
water level and at least 5 feet above the bottom of the well.

Prime pump. Air entrained in the water reduces performance
and will dam age the pump.

NOTICE: Do not inter change controls with other models.
Serious damage can result to the unit if pump and controls
do not match.

Motor control systems and pump units are repairable in the
field. To avoid serious damage to the unit, use only parts
obtained from authorized dealers/suppliers. System controls
and pump must match.

Average number of starts per day will influence motor and
control component life (starters, relays, capacitors, etc).
Select pump size, tank size and control components for
lowest practical number of starts per day. Excessive cycling
accelerates bearing, spline, and pump wear and con trol
contact erosion.

Your pump is designed to provide maximum efficiency under
specific capacity and head conditions. Do not oper ate it
beyond specified limits.

SPECIFICATIONS

Table 1: Frequency of Starts

Avg. No. of Starts per 24 Hr. Day

HP Rating Single Phase Three Phase

1 to 5 50 150
7-1/2 to 30 25 50
40 and over – 50

Table 2: Weight of Pipe (Column)

Weight per Foot (Lbs)

Pipe Size (In) Full Empty

2-1/2 7.9 5.8
3 10.8 7.6
4 16.3 10.8
5 23.3 14.62
6 31.5 18.97

Table 3: Weight of Cable per 1000 Ft. (lbs.)

AWG 3-Phase 1-phase
Size Nom. Dia. Weight Nom. Dia. Weight

12-3 .500 140 .487 130
10-3 .545 186 .517 161
8-3 .771 328 .750 293
6-3 .965 525 .826 400
4-3 1.071 717
2-3 1.243 1066

Table 4: Cable Wire Resistance

AWG Wire Size Resist (Ohms/Ft)

14 .0050
12 .0032
10 .0020
8 .0013
6 .0008
4 .0005
2 .0003

Table 5: Minimum Cooling Water Flow

ID of

Casing

7 20 (76) 0.23 15 (57) 0.33

8 30 (114) 0.25 30 (114) 0.36

10 50 (189) 0.24 60 (227) 0.35

12 80 (303) 0.25 100 (379) 0.36

14 110 (416) 0.25 140 (530) 0.35

16 150 (568) 0.25 180 (681) 0.33

4” Motors 6” Motors

Flow GPM

(LPM)

FPS

Flow GPM

(LPM)

FPS

PRE-INSTALLATION PROCEDURES

Electrical Splices and Connections

Splices must be waterproof. Make a strong mechanical
bond between the motor leads and the cable to avoid
high resistance at the connection. A poor mechanical
con nection, or a poorly wrapped splice, can cause motor
problems and motor failure.

Before connecting the motor to the cable, perform a
ground check to assure that the motor has not been
damaged. Attach one end of an ohmmeter lead to any of
the three motor leads and the other ohmmeter lead to the
pump intake bracket. A new motor must have a resistance
of 2 megohms or greater. If not, contact your dealer.
Repeat for all three leads.

Prepare the cable and make the mechanical connections
(Figure 1A) and splices as follows:

a.

3"

3"

1

"

b.

c.

Figure 1A: Cable Splicing: Solid Wire, Stranded Wire

1. Cut motor leads and corresponding cable ends at 3-inch

2. Cut connecting cable to match the motor leads.

3. When using a butt connector, expose bare wire for

NOTICE: Butt connectors may be used with solid wires

4. Clean exposed ends of wire thoroughly with emery

5A. BUTT CONNECTORS (Figure 1A): Insert wires into con-

5B. SOLDERED CONNECTIONS (Figure 1A):

NOTICE: Do not use acid core solder or corrosive
solder paste.

2

spacings to stagger connections for a smooth splice.

NOTICE: Match color coded wires, red to red, black to
black, and white to white.

about 1/2”. When using stranded wire, expose about
1” of wire.

through 8 AWG, or stranded wires through 10 AWG.

cloth or sandpaper to assure good electrical
connections.

nector until insulation butts up against connector. Crimp
connector to wires with a pair of crimping pliers. Pull on
cable to make sure the connection is solid and tight.

I. Straighten individual cable strands and spread

apart slightly.

II. Clean each strand and push strands of cable into

matching (color-coded) open strands of the motor leads.

Formula to find flow rate:

GPM x .409

FPS =
D12 – D22

D1 = Casing inside diameter
D2 = Motor outside diameter

NOTICE: If flow rate past motor is expected to be less than rate shown in table, install a shroud around motor to force
cooling flow past shell. To minimize erosion to shell if flow rate is expected to be more than 10 FPS (especially if sand is
present), reduce flow through pump to reduce flow past shell.

2

III. Wrap entire length of joint with fine copper wire

3"

3"

"

1
2

a.

b.

c.

until strands are compressed.

IV. Apply heat and solder. Solder will follow the heat;

make sure solder flows throughout the joint. Pull
firmly on cable to test joint.

6. Repeat Step 5 for each lead.

7. Taping splice (Figure 1B):

Because friction tape is not water

resistant, never use friction tape on a water-tight
splice. Use Scotch

®

Number 33, or equivalent.

4. If leak is not in splice, slowly pull cable out of water
until reading changes to “infinity”. Reading will change
to “infinity” when leak comes out of water.

5. Repair cable by splicing as explained under “Electrical
Splices and Connections”, Page 2.

Rotation Check (3-Phase Only)

After satisfactorily completing continuity test, connect
cable to pump controller. Check 3-phase motors for correct
rotation. If necessary, reverse any two cable leads at
the controller and recheck rotation. Permanently mark
and match to control box terminals for future reference.

d.

Connect cable to motor controller and then wire controller
to disconnect switch. Connect temporary jumper wire
between proper terminals in controller to temporarily

e.

energize magnetic coil.

Momentarily engage disconnect switch and note direction
of rotation. The shaft should rotate counterclockwise when

Figure 1B: Stagger splices and tape

7A. Clean joints and adjoining cable/wire insulation of all

grease and dirt, and build up joint area with tape until
it matches diameter of cable.

7B. Starting 1-1/2” back from the joint, firmly apply one

viewed from the top or shaft end of the motor. If rotation is
incorrect, reverse any two wires; mark wires to correspond
with the controller terminal numbers.

NOTICE: Pump is water lubricated. Do not operate the
pump for more than 5 seconds while it is out of water.

layer of tape, overlapping about half the previous lap
and continuing approximately 1-1/2” beyond joint. Cut
tape evenly and press both ends firmly against cable.

7C. Apply two additional layers of tape, as described in

Step 7B, beginning and ending 1-1/2” beyond the
previous starting/ending points.

Splice and Cable Continuity Test

Before installing pump check cable and splices as follows
(see Figure 1C):

1. Submerge

Ohmmeter set at
Rx100K or
Voltmeter set at
H1 Ohms

Attach lead to
metal tank or
immerse in water

cable and
splice
in steel
barrel
filled with

General

After completing all connections and tests, connect a
5-foot length of pipe to pump.

Lower pump into well with pipe clamps attached to the
5-foot pipe. Attach a standard length of pipe to 5-foot
length and lower pump CAREFULLY into well.

NOTICE: Do not use a pipe longer than 5 feet for the
first con nection. Hoisting pump upright with a long length
of pipe can cause pump misalignment from excessive
leverage.

and cable to avoid damage to cable insulation.

INSTALLATION

Use extreme care when lowering pump

water.
Make sure
both ends
of cable
are out of
water.

2. Clip one
ohmmeter
lead to
barrel.

Figure 1C: Splice and Cable continuity

Test each lead in cable successively by connecting
the other ohmmeter lead to the three cable leads, one
after the other.

3. If resistance reading goes to zero on any cable lead,

a leak to ground is present. Pull splice out of water.
If meter reading changes to “infinity” (no reading) the
leak is in the splice.

Anchor power cable to pipe every 20 feet with adjustable
steel band clamps. Protect insulation from clamps with
pieces of split rubber hose inserted between clamps and
cable. Attach cable to pipe halfway between clamps with
waterproof tape.

SUBMERGENCE

Be sure the pump is always submerged, especially at
extreme pumping rates. Install pump at least 10 to 20 feet
below the lowest “drawdown” water level and at least 5
feet above bottom of well.

Check Valves

NOTICE: Pump back spin and hydraulic shock can cause

severe damage to pump and motor. Install at least one
check valve to help prevent this.

Install check valve in discharge pipe, not more than 25 feet
above pump. For 6” and larger submersible pumps installed
more than 600 feet deep, install a second check valve at the
pipe joint nearest to the half-way point between pump and

Scotch® is a registered trademark of 3M Company.

ground level.

3

NOTICE: To avoid water hammer and pipe breakage,
distance from first check valve to second check valve
should not equal distance from second check valve to
ground level.

Well and Pump Test

Check and record static water level of well before starting
tests. Before making final piping connections, test flow
rate, capacity, and condition of well.

Do not operate pump with discharge valve closed.

Operate pump only within pressure and flow limits of
operating range established by performance curve.
Operating pump outside of pressure and flow limits can
damage bearings and over heat the motor.

NOTICE: If sand is present in discharge, allow pump to
run with discharge completely open until water is clear. If
loud rattling noises develop, pump is probably cavitating.
Gradually close discharge valve until rattling stops.
Operating with sand in the water or while cavitating can
cause serious internal erosion to impellers and bowls.

Installation - Electrical Tests

Risk of high voltage electrical shock when

testing. Can stun, burn, or kill. Only qualified electricians

should perform these tests. When testing, use all normal
precautions for the voltages involved.

NOTICE: Readings more than 10% above or below rated
nameplate voltage can damage pump; correct before
placing pump in service. Test as follows:

1. Disconnect main power supply and open controller.

2. Connect power and start pump. For 3-phase motors,
read voltage across three pairs of leads (L1 – L3,
L3 – L2, L2 – L1) while pump is operating. For single
phase motors, read voltage across L1 and L2 while
pump is operating. Voltage should be within ±10% of
motor nameplate rated voltage. If not, consult power
company.

Load current test (Figure 3)

Controller

G

L3

Incoming

L2

Power

L1

Ground

Electrical test of motor, cable, connections

The cable and splices can be damaged as the pump is
lowered into the well. To electrically test them, attach
one lead of ohmmeter to pipe. Attach other lead to each
cable lead in turn. See motor owner’s manual for required
resistance in a good motor. A low reading indicates that
cable or splice has developed a leak to ground. Remove
pump from well and correct problem before proceeding
with installation.

Measure electrical resistance between motor leads and
well casing when motor is cold.

Voltage test (Figure 2)

Low or high voltages can cause motor failure. While pump
is operating, check voltage across each pair of leads at
motor controller.

Controller

G

L3

Incoming

L2

Power

L1

Ground

Figure 2: Voltage Test

To Pump

To Pump

Figure 3: Load Current Test

Load current should be obtained on each motor lead at
the controller. Partially close pump dis charge valve (keep
pressure and flow within specified operating range) until
maximum amp reading has been obtained. Compare
reading with motor nameplate rating. If reading is 15
percent or more over rated load, check for incorrect
voltage in supply line or overload due to abrasives in
pump. Find and correct problem before putting pump in
service.

THREE-PHASE CURRENT

UNBALANCE

Determine current unbalance by measuring current in
each power lead. Measure current for all three possible
hookups. Use example and worksheet (Page 5) to
calculate current unbalance on a three phase supply
system and retain for future reference.

NOTICE: Current unbalance should not exceed 5%. If
unbalance cannot be corrected by rolling leads, locate and
correct source of unbalance.

If, on all three possible hookups, the reading furthest
from average stays on the same power lead, most of the
unbalance is coming from the power source.

However, if the reading furthest from average changes
leads as the hookup changes (that is, stays with a
particular motor lead), most of the unbalance is on
the “motor side” of the starter. In this case, consider a
damaged cable, leaking splice, poor connection, or faulty
motor winding.

4

Current Unbalance Example and Worksheet

3-Phase Current Unbalance - Example

Here is an example of current readings at maximum
pump loads on each leg of a three wire hookup. Make
cal cu lations for all three possible hookups.

A. For each hookup, add the readings for the three legs:
Ex.: Hookup #1 Hookup #2: Hookup #3
L1 = 51Amps L1 = 50 Amps L1 = 50 Amps
L2 = 46 Amps L2 = 48 Amps L2 = 49 Amps
L3 = 53 Amps L3 = 52 Amps L3 = 51 Amps

Total 150 Amps Total 150 Amps Total 150 Amps

B. Divide each total by three to get average amps:
Example: 150/3 = 50
Example: 150/3 = 50
Example: 150/3 = 50

C. For each hookup, find current value farthest from

aver age (Calculate the greatest current difference
from the average).

Ex. #1 Ex. #2 Ex. #3
50 Amps 50 Amps 50 Amps

–46 Amps –48 Amps –49 Amps

= 4 Amps = 2 Amps = 1 Amps

D. Divide this difference by the average and multiply by

100 to obtain the percentage of unbalance. Example:

Ex. 1: 4/50 = .08 x 100 = 8%
Ex. 2: 2/50 = .04 x 100 = 4%
Ex. 3: 1/50 = .02 x 100 = 2%

Use smallest percentage unbalance, in this case Ex. 3.

3-Phase Current Unbalance - Worksheet

Use this worksheet to calculate current unbalance for
your installation.

A. Add the readings for the three legs:
Ex.: Hookup #1 Hookup #2: Hookup #3
L1 = Amps L1 = Amps L1 = Amps
L2 = Amps L2 = Amps L2 = Amps
L3 = Amps L3 = Amps L3 = Amps

Total Amps Total Amps Total Amps

B. Divide each total by three to get average amps:
Hookup #1: /3 =
Hookup #2: /3 =
Hookup #3: /3 =

C. For each hookup, find current value farthest from

aver age (Calculate the greatest current difference

from the average).
Hookup #1 Hookup #2 Hookup #3
Amps Amps Amps
Amps Amps Amps

Amps Amps Amps

D. Divide this difference by the average to obtain the

percentage of unbalance:

Hookup #1: / = x100 = %

Hookup #2: / = x100 = %

Hookup #3: / = x100 = %

Use hookup with smallest percentage unbalance.

SERVICE

General

When installed in a clear well and operated under normal
conditions, the submersible turbine pump requires no
special maintenance. The hermetically sealed motor is pre­filled and self-lubricating. Completely tested at the factory,
it should provide many years of dependable service.
The motor is a continuous duty type and can operate
continuously for long periods.

Removing Pump From Well

Most pump problems are caused by above-ground
electrical problems. Minor control box components
or outside electrical difficulties (such as low voltage)
can cause a mal function. Before removing pump from
well, check motor windings for damage (check winding
resistance with an ohmmeter – see Page 6). Eliminate all
above-ground trouble causes before pulling pump. Pull the
pump only as a last resort.

Sandlocked Pump:

NOTICE: Before pulling pump, make all possible above

ground electrical tests. Most submersible pump problems
are above ground, not in the pump itself.

NOTICE: Motor failure can result from starting a sand­locked pump. Do not bypass overload circuit or exceed
electrical rating when trying to start a seized pump.

Remove a sandlocked pump from well for cleaning. To
prevent pump from locking again when reinstalled, clean
the well thoroughly before reinstalling the pump.

Cleaning Sandlocked Pump:

1. Insert a reducing bushing in discharge adapter cap to

receive a hose coupling.

2. Use a hose to flush pump backwards (discharge

to suction). Oscillate shaft backwards and forwards
with a pump pliers and backwash pump for several
minutes.

3. If pump cannot be freed, disconnect pump from motor,

disassemble liquid end (see Page 6) and backwash
sand from each part.

Checking Pump Performance:

Water containing abrasives can cause impeller wear
and reduce impeller efficiency, resulting in reduced
performance. In such cases, it is necessary to remove the
pump from the well and replace the impellers to maintain
capacity and pressure. To assure quality and integrity of
the unit, re place with genuine parts available from your
dealer.

5

ELECTRICAL TESTS

The following electrical checks can be made with

pump installed.

Risk of high voltage electrical shock when
testing. Can stun, burn, or kill. Only qualified
electricians should perform these tests. When testing,
use all normal precautions for the voltages involved.

Circuit (Winding) Resistance Test (Figure 4)

Controller

G

L3

Incoming

L2

Power

L1

Ground

Ohmmeter

Set at Rx1 or

Voltmeter

Set on LO

Ohms

To Pump

Figure 4: Circuit (Winding) Resistance Test

1. Shut off main power supply and disconnect motor wires.

2. Attach two ohmmeter leads to pairs of cable wires in

turn (black and red wires on three wire single phase
units). Compare readings with data provided in motor
manual.

3. If reading is considerably higher than chart, an open

circuit (broken wire) is indicated; if reading is con­siderably lower, a short circuit is indicated. In either
case, remove pump from well and repair unit.

NOTICE: Be sure to include cable and winding resistance.
Multiply cable length by the per-foot cable resistance (see
Table 4, Page 2) and add winding resistance from motor
chart to get total.

Ground Check (Figure 5)

Controller

G

L3

Incoming

L2

Power

L1

Ground

Ohmmeter

Set at Rx100K

or Voltmeter

Set on H1

Ohms

To Pump

Figure 5: Ground Check

4. Raise pump, watching resistance reading. When re sis­tance goes to infinity, fault has come out of the water.
If ground fault is located in cable or splice, repair it.

5. If ground fault appears to be located in motor, remove
pump from well. Cut cable at motor side of splice and
determine whether or not motor is grounded. If motor
indicates complete ground (resistance reading goes to
zero) replace unit.

If motor is not grounded, re-check splice and cable.

PUMP / MOTOR SEPARATION

NOTICE: Refer to Repair Parts, Page 10.

Removing Pump From Motor

1. Remove the cable guard from the pump; cut the cable
off of the motor leads just above the splice.

2. Remove the nuts (4” motors) or bolts (6” motors)
holding the pump to the motor. Using suitable lifting
apparatus, hoist pump off of motor.

3. If you are returning the motor to the factory, cut motor
lead above cable splice, leaving motor lead installed
in motor. Don’t work on the motor before returning it.
To prevent damage in transit, crate the motor as it was
when shipped new.

Pump Disassembly

1. Remove the suction screen.

2. Remove coupling from shaft.

3. Fasten pump in chain vise.

4. Remove the discharge.

5. Remove the last stage bowl. Bowls are held together
with thread-locking compound. You may need to heat
the bowls to loosen the threads.

NOTE: Threads are left hand.

equipment when handling hot bowls.

6. Bolt the fixture to the pump suction bracket. Add 3/16”
spacer between shaft and fixture to lift shaft assembly
and aid in impeller removal.

7. Slip the collet driver, large end first, over the shaft and
tap on the impeller to loosen the collet. Do not use a
pipe wrench or any other tool that could damage or
scar the impeller or the pump shaft.

8. Remove the impeller and the collet. Mark the impeller
and the bowl as they come off so that they can be
reassembled as a pair.

9. Repeat steps 5, 7 and 8 for all stages.

10. Clean each part. Dress down any burrs raised during
disassembly. Make sure all flanges and mating fits are
free of burrs, rust, and dirt.

Risk of burns. Use proper safety

1. Shut off main power supply and disconnect motor wires.

2. Attach one ohmmeter lead to pipe or METAL well
casing and the other lead, in turn, to each individual
motor wire.

3. If resistance reading goes to zero after touching any
of the wires, the pump should be raised to determine
location of ground fault (cable, motor, or splice).

6

To avoid major repairs, make the checks listed below every 4 to 6 months.

TEST

1. Measure and record the standing
water level (from top of well
casing).

2. Measure electrical resistance
between motor leads and well
casing with motor cold.

3. Check pump flow capacity
(gallons per minute).

4. Check pump discharge pressure
(PSI) at operating conditions.

5. Check drawdown level (in feet)
from standing water level.

6. Measure voltage across motor
leads while pump is operating.

PREVENTIVE MAINTENANCE

RESULT SHOULD BE

1. Reference number.

2. See motor manual.

3. At least 90% of readings at
installation.

4. At least 90% of readings at
installation.

5. High enough so that pump does
not break suction.

6. Within ±10% of rated voltage.

POSSIBLE INDICATIONS

1. To aid in monitoring pump
performance.

2. See motor manual.

3. Lower readings may indicate
pump needs repair.

4. Lower reading indicates pump
wear, increased friction losses, or
change in standing water level in
well.

5. Cavitation can damage pump;
increased drawdown may
indicate reduced well flow.

6. If voltage is more than 110% or
less than 90% of rated voltage,
consult power company.

PUMP INSPECTION / MAINTENANCE

Wear: While pump is disassembled, visually check the
following for wear:

Bearings Bowl

Skirts

Shaft Runout (TIR): Pump shaft must be straight to within
.002” TIR, measured every 6” along the shaft.

Impeller to Intake Adapter Insert/Bowl Clearance (see
Table 6, below): Measure bowl ID and impeller eye OD.

Subtract the impeller dimension from the bowl dimension;
check against maximum/minimum differences given in
Table 6, below. Replace the impeller or the bowl (or both) if
the dimensions are outside the parameters given in Table 6.

Discharge Bearing to Shaft Clearance (See Table 7,
below): Measure the shaft OD at the top of the shaft and

the discharge bearing ID. Subtract the shaft OD from the
bearing ID; check against maximum/minimum differences
given in Table 7, below. Replace the bearing or the shaft
(or both) if the dimensions are outside the parameters
given in Table 7.

NOTICE: Axial wear may indicate improper upthrust
adjustment. See Step 10 or Step 11, Page 9.

Upthrust
Screw

Impellers Pump

Shaft

Shaft Diameter - TMH Series: 1.00” Diameter

Bearing Replacement:

TMH models come standard with all neoprene bearings
in the bowls and a composite discharge bearing. Bronze
bearings are available as an option.

Neoprene Bearing Replacement:

A. Use a wooden or plastic tool to push neoprene

bearing out of bowl. Push from discharge side of bowl
toward suction side.

B. Remove all fragments from bowl bearing bore and

clean up the bore .

C. Lubricate the new bearing with talcum powder or

water (oil or glycerin do not give sufficient flow to
adequately lubricate the bearing) and push it into the
bearing bore.

Bronze Bearing Replacement:

1. Press old bearing out with an arbor press or tap it out with
a hammer and dowel. Do not score the bearing bore.

2. Wipe the bearing bore clean.

3. Press the new bearing into the bore; use light oil if
necessary to aid the pressing. Make sure the bearing
is aligned with the bearing bore.

Table 6: Intake Adapter Insert/Bowl to Impeller Clearance - NOTICE: For clearance PER SIDE, divide ‘Difference’ by 2. If
clearances check out OK but impeller still binds on bowl, check impeller concentricity.

Model

TMH Series 3.500/3.498” 3.491/3.489” 0.011”/0.007”

A: Intake Adapter Insert/Bowl ID

Max/Min

B: Impeller Eye OD Max/Min A-B = Difference Max/Min

Table 7: Bearing to Shaft Clearance - NOTICE: For clearance PER SIDE, divide ‘Difference’ by 2.

Model

TMH

Series

A: Neoprene

Bowl Bearing

ID Max/Min

1.0133” /

1.0113”

A-B: Bronze

Bowl/Discharge

Bearing ID

Max/Min

1.016” / 1.014”

Composite

Discharge

Bearing ID

Max/Min

1.0124 /

1.0122

B: Shaft

OD

Max/Min

1.000” /

0.998”

7

A-B = Difference

Max/Min

(Neoprene)

0.0135” / 0.0113” 0.016” / 0.014” 0.0144” / 0.0122”

A-B = Difference

Max/Min
(Bronze)

A-B = Difference

Max/Min

(Composite)

ASSEMBLY INSTRUCTIONS

• Top Upthrust. No Intake Adapter Insert.

• Use an assembly fixture for disassembly/assembly;
purchase it from Pentair. When ordering, please
specify pump model number, motor size, and
horsepower.

Motor Interface

5TMH and 6TMH motor adapters are dual regestered
to allow the use of either a 4” or 6” motor. 6TMH has a
seperate 8” motor adapter, 7TMH has seperate 6” and 8”
motor adapters.

• All TMH Series threaded-bowl units have left-hand
bowl threads.

• The stub shaft stick-up is 2-7/8” for 6” motors; the
stick-up is 1.50” for 4” motors.

2.875”

1.500”

4.000”

4” Motor Stickup 6” Motor Stickup 8” Motor Stickup

Assembly Fixtures & Tools

Key No. Part Number Description

1 M16666 TMH Bearing Press Tool

2 M16667

3 M16668 8IN Assembly Fixture

4 M16768 Horizontal Build Assembly Sleeve

5 M16769 4-6IN Fixture Horizontal Assembly

6 M16788 Collet Driver

7 M16676/7/8/9 TMH Assembly Wrenches

4-6IN Assembly Fixture (0.100”
Reduced Height)

Inspection Tools

8 M16822 Shaft Free Rotation Tool

9 M16670 4-6IN Shaft Position Inspection Tool

10 M16671 8IN Shaft Position Inspection Tool

1 2 3

7

Wrench M16676 M16677 M16678 M16679

5TMH-75 X

5TMH-110 X

5TMH-170 X

5TMH-250 X

5TMH-375 X

5TMH-425 X

6TMH-140 X

6TMH-200 X

6TMH-300 X

6TMH-450 X

7TMH-230 X

7TMH-350 X

7TMH-500 X

7TMH-750 X

4

9

6

5

10

8

8
8

Assembly Procedure

Washers

Washers

The recommended and preferred method of assembly
is vertical with 2.775” stickup. There are (3) key build
variations that impact the assembly process. They are:

1. Vertical with 2.875” stickup, secured shaft

2. Vertical with 2.875” stickup, unsecured shaft

3. Horizontal assembly

Conditions related to these variances are:

• If using a fixture with stickup height of 2.775”, the shaft

SHOULD be secured.

• If the shaft is NOT secured, the “spacer washer”

method SHOULD be used for assembly of each stage.
Building with “Washers” at each stage is advised to
minimize the potential for shaft bounce (when striking
with collet driver), and also to allow for easier removal
of impeller if necessary.

Variation 1: Vertical w/ 2.875” Stickup, secured
shaft

1.1 Place (4) 0.125” spacer washers on assembly
fixture equally spaced.

Spacing

4” or 6” Motor Assembly (Recommended: Vertical
w/ 2.775” Stickup)

Using fixture M16667 with 2.775” stickup, building vertically,
and secured shaft (preferred method):

1. Using arbor press, press insert ring into suction bracket
(if insert required)

• Apply Loctite

®

271 (20 min cure time, 24 hours for

full cure)

• Refer to table below for final press depth

• Insert ring fit should not be loose fitting (a slip fit is

acceptable with Loctite)

6”

SERIES

5TMH-75 M16053 — M16272 0.36”

5TMH-110 M16053 — M16273 0.57”

5TMH-170 M16053 — M16273 0.57”

5TMH-250 M16053 — M16274 0.51”

5TMH-375 M16053 — Not Required N/A

5TMH-425 M16053 — Not Required N/A

6TMH-140 M15869 M16428 M15876 .63

6TMH-200 M15869 M16428 M15876 .63

6TMH-300 M15869 M16428 M15877 .48

6TMH-450 M15869 M16428 Not Required N/A

7TMH-230 M16386 M16573 M16596 .48

7TMH-350 M16386 M16673 M16627 .48

7TMH-500 M16386 M16673 M16586 .51

7TMH-750 M16386 M16673 Not Required N/A

Loctite® is a registered trademark of Henkel Corporation.

BRACKET

8”

BRACKET INSERT HEIGHT

2. Place suction bracket on fixture, and secure bracket to
fixture (bolt bracket to fixture)

• NO spacer washers should be used with 2.775”

stickup fixture.

• Tighten at least 2 bolts 180 degrees apart.

Variation 1: Vertical w/ 2.875” Stickup, secured
shaft

2. Place suction bracket on fixture (w/ spacer
washers)

• Spacer washers should remain between
fixture and bracket during entire assembly

Spacing

9

Variation 2: Vertical w/ 2.875” Stickup, unsecured

Washers

0.0"

0.0"

Left-hand
Thread!

shaft

2. Remove spacer washers and resecure bracket
to fixture.

Spacing

+/-0.125”

Variation 3: Horizontal

2.1 Add fixture sleeve M16769 to the assembly
fixture. The sleeve will assist with holding the
shaft when the assembly is horizontal.

3. Clean shaft to remove all contaminants and oils, and
check shaft for straightness within 0.002 TIR measured
every 6 inches. Straighten as required.

4. Place impeller into insert ring (or bracket if no insert
required)

• Impeller should slip easily into place and spin freely

• Use largest trims first. Prioritize trim A, then trim B,

and then trim C.

5. Place shaft through impeller bore and thread to fixture
(hand tight)

7. Check that there is no gap between the shaft and
fixture stickup.

0.0"

Variation 3: Horizontal

7.1 Clamp the assembly (with fixture attached) in a
chain vice.

6. Clean collet of oil and contaminents. Place collet over
shaft, slide into position in impeller bore. Then, using
collet driver M16788, set the collet with two to three
hard blows.

• Collet position should be +/-0.125” from flush with

impeller hub

8. Install rubber bearing S13636, into diffuser bowl (if not
pre-assembled).

• Apply water or talcum powder to bearing, and fold

for easier installation.
◊ Insert bearing press tool M16666 into rubber

bearing to ensure it is properly seated.

• If using bronze bearing S10708, or composite

bearings (Vesconite: M15886), press bearing into
diffuser bowl using an arbor press and bearing
press tool M16666. Press bearing flush to shoulder.

10

9. Apply Loctite 271 to bracket or bowl threads, and

0.0"

1/8"

thread bowl to bracket

• Loctite 271 ➞ 20 min cure time, 24 hours for full
cure

• Tighten using strap, chain or spanner wrench per
table:

11. Repeat steps 6 – 10 until all stages are installed.

12. Loosely assemble discharge (see table below),
up-thrust screw M15882, and nut M15881

• NOTICE: Up-thrust screw should not protrude into

bearing bore. Screw depth is set after assembling
discharge to pump.

SERIES SPANNER WRENCH

5TMH-75 M16676
5TMH-110 M16676
5TMH-170 M16676
5TMH-250 M16677
5TMH-375 M16676
5TMH-425 M16677
6TMH-140 M16676
6TMH-200 M16676
6TMH-300 M16678
6TMH-450 M16679
7TMH-230 M16677
7TMH-350 M16677
7TMH-500 M16679
7TMH-750 M16679

• The bowls should be tightened snug using wrench.
◊ Excessive force is not required with a left-hand

thread and Loctite.

Variation 2: Vertical w/ 2.875” Stickup,
unsecured shaft

9.1 Apply Loctite 271 to bracket or bowl threads,
and thread bowl to within 0.125” of the bracket.
Place 0.125” washers between bowl and
bracket, and tighten to hand tight.Loctite 271 ➞
20 min cure time, 24 hours for full cure

NOTE: Loctite® 271 has a 20 min.
working time, 24 hr. full-cure time.
For steps 7,8, and 9, work quickly!

10. Clean shaft and collet of contaminates. Then, slide the
next impeller over shaft into position.

Variation 2: Vertical w/ 2.875” Stickup,
unsecured shaft

10.1 Remove washers from between the bowl and
bracket. Thread bowl to flush with bracket.

0.0"

1/8"

0.0"

SERIES

5TMH-75

5TMH-110

5TMH-170

5TMH-250

5TMH-375

5TMH-425

6TMH-140

6TMH-200

6TMH-300

6TMH-450

7TMH-230

7TMH-350

7TMH-500

7TMH-750

PART

NUMBER

M16054 3” NPT

M10657 3” BSPT

M16054 3” NPT

M10657 3” BSPT

M16054 3” NPT

M10657 3” BSPT

M16055 4” NPT

M16058 4” BSPT

M16055 4” NPT

M16058 4” BSPT

M16055 4” NPT

M16058 4” BSPT

M15868 4” NPT

M15885 4” BSPT

M15868 4” NPT

M15885 4” BSPT

M15868 4” NPT

M15885 4” BSPT

M15868 4” NPT

M15885 4” BSPT

M16387 5”–8 FNPT 6”–8 NPT

M11652 5”–11 FNPT 6”–11 NPT

M16387 5”–8 FNPT 6”–8 NPT

M11652 5”–11 FNPT 6”–11 NPT

M16387 5”–8 FNPT 6”–8 NPT

M11652 5”–11 FNPT 6”–11 NPT

M16387 5”–8 FNPT 6”–8 NPT

M11652 5”–11 FNPT 6”–11 NPT

THREAD

“A”

THREAD

“B”

13. Apply Loctite 271 to bowl threads, and thread
discharge snug to bowl.

• Loctite 271 ➞ 20 min cure time, 24 hours for full

cure.

• Tighten using strap chain or spanner wrench per

table above (as in step 12).

14. Thread screw down until it bottoms on shaft, then back
screw out 3 full turns (1.5 turns for Variation 2).

• Screw has 13 turns per inch = 0.077” per turn.

15. Tighten nut, torque to 40+/-3 (ft-lbs)

• NOTICE: Maintain screw position while tightening

the nut.

• Apply Loctite 271 to nut.

11

16. Use shaft position tool M16670 to check shaft height.

• There should be between 0.100” and 0.125” lift
when assembled to the motor. With the shaft in the
full down position, use inspection tool M16670 to
check for proper lift.

• With the shaft in the full up position, there should
be a gap of approximately 0.100” between the shaft
position inspection tool and the pump shaft when
the tool is flush with the bracket.

0.100” to 0.125

1 7. Use shaft rotation tool M16822 to check that pump

rotates freely.

18. Assemble coupling M15872 and coupling guard
M15874

• Apply 3M

®

Scotch-Weld™ 2141 to permanently
bond components or use B87051 coupling
assembly.

3M® and Scotch-Weld™ are registered trademarks of 3M Company.

12

TMH Series

1

2

3

4

5

6

7

8

9

Repair Parts

TMH Series

Submersible Turbine Pumps

Key Part
No. Description
1 Upthrust Lock Nut

2 Upthrust Screw
3 Discharge
4 Discharge Bearing
5 Pump Shaft
6 Bowl
7 Neoprene Bearing
8 Collet
9 Impeller
10 Sand Boot
11A Splined Coupling (6” Motors)
11B 4” Coupling Adapter (4” Motors)
12 Intake Adapter Insert
13 Motor Suction Bracket
14 Suction Screen Screws
15 Suction Screen
16 Lead Guard Clamp w/ Screws
17 Lead Guard
NOTICE: When using 11B, discard 10.

16

17

16

10

11A

10

12

13

Please be sure to include pump model number,

6

7

8

9

11B

horsepower, GPM rating and any other pertinent
information when ordering pump parts.

NOTICE: Please refer to Berkeley Submersible Repair

Parts for detailed parts breakdown and part numbers.

15
14

13

TROUBLESHOOTING

Hazardous voltage. Can shock, burn, or
kill. When troubleshooting or servicing pump, use all
normal precautions for the voltages involved.

PROBLEM POSSIBLE CAUSE REMEDY

Fuses blow or overload
circuit breaker trips when
motor starts.

Fuses blow or overload trips
while motor is running.

Motor does not start but does
not blow fuses or trip circuit
breaker.

Pump does not shut off. Cable leads improperly connected. Check wiring diagram on box cover for correct

Pump sandlocked. 1. Check motor winding resistance - see “Circuit

Low or high voltage. Check line voltage (see Page 4). If high or low, contact

Cable damaged or shorted. Check pump cable for ground (see Page 6).
Pump forced into crooked well Forcing pump into a crooked hole will cause mis

Low or high voltage. Check voltage on service lines (see Page 4).
Water contains excessive sand. Remove pump and clean sand out of well.
Motor or cable shorted and/or

grounded.
Fuses blown or circuit breaker

tripped.
Voltage does not reach terminals. 3-Phase: Check voltage at controller between wire

Loose wire in control box. Check and tighten all wires.
Defective magnetic controller coil. Check starter and coil.

1. Disconnect power unless required for testing.

2. Have electrical testing done by a qualified electrician.

3. Most problems occur above ground. Remove pump
from well only as a last resort.

(Winding) Resistance Test”, Page 6.

2. If motor is not shorted, turn on current and rap
discharge pipe sharply to loosen sand.

3. If using a 3-phase motor, bump start the motor in
reverse. Rewire correctly. Restart.

4. Pull pump and clean.

power company.

alignment of pump and motor. Consult well driller.

See “Circuit (Winding) Resistance Test” and “Ground
Check”, Page 6.

Reset circuit breakers or replace fuses.

pairs: L1 – L3, L3 – L2, L2 – L1.
Single Phase: Check voltage between L1 and L2 on

box terminal strip.

connections.

Motor runs, but delivers little
or no water.

Horizontal line check valve installed
backwards.

Motor running backwards (3-Phase
only).

Pump air locked. Start and stop pump several times allowing one minute

Water level in well has dropped. 1. Restrict pump flow to equal well production.

Leak in discharge pipe. Raise pipe until leak is found.
Coupling between motor shaft and

pump shaft broken.

Pump parts worn from abrasives. 1. Check pump shut-off pressure. Pressure should be

Intake screen clogged. Remove pump from well and clean screen.
Pump set below recommended

depth.

Discharge pipe friction reduces
output.

Reinstall correctly.

Reconnect motor for proper rotation (see Page 3).

between stops and starts.

2. Install liquid level control.

3. Reset pump lower in well.

Remove pump from well and check coupling.

at least 90% of pressure at installation.

2. Replace worn parts.

1. Reduce pressure switch setting until pump will shut
off.

2. Install pump producing higher pressure.

Install larger pipe or pump producing higher pressure.

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THIS PAGE INTENTIONALLY LEFT BLANK.

15

Limited Warranty

BERKELEY warrants to the original consumer purchaser (“Purchaser” or “You”) of the products listed below, that they will be free
from defects in material and workmanship for the Warranty Period shown below.

Product Warranty Period

Water Systems:

Water Systems Products — jet pumps, small centrifugal pumps, submersible pumps and
related accessories

Pro-Source™ Composite Tanks 5 years from date of original installation

Pro-Source™ Steel Pressure Tanks 5 years from date of original installation

Pro-Source™ Epoxy-Lined Tanks 3 years from date of original installation

Sump/Sewage/Effluent Products

Agricultural/Commercial:

Centrifugals – close-coupled motor drive, frame mount, SAE mount, engine drive, VMS, SSCX,
SSHM, solids handling, submersible solids handling

Submersible Turbines, 6” diameter and larger

Whichever occurs first:

12 months from date of original installation, or
18 months from date of manufacture

12 months from date of original installation, or
18 months from date of manufacture

12 months from date of original installation, or
24 months from date of manufacture

12 months from date of original installation, or
24 months from date of manufacture

Our limited warranty will not apply to any product that, in our sole judgement, has been subject to negligence, misapplication,
improper installation, or improper maintenance. Without limiting the foregoing, operating a three phase motor with single phase
power through a phase converter will void the warranty. Note also that three phase motors must be protected by three-leg,
ambient compensated, extra-quick trip overload relays of the recommended size or the warranty is void.

Your only remedy, and BERKELEY’s only duty, is that BERKELEY repair or replace defective products (at BERKELEY’s choice). You
must pay all labor and shipping charges associated with this warranty and must request warranty service through the installing
dealer as soon as a problem is discovered. No request for service will be accepted if received after the Warranty Period has
expired. This warranty is not transferable.

BERKELEY SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, OR CONTINGENT DAMAGES WHATSOEVER.
THE FOREGOING LIMITED WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES,

INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE FOREGOING LIMITED WARRANTIES SHALL NOT EXTEND BEYOND THE DURATION PROVIDED HEREIN.

Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations on the duration of an
implied warranty, so the above limitations or exclusions may not apply to You. This warranty gives You specific legal rights and You
may also have other rights which vary from state to state.

This Limited Warranty is effective June 1, 2011 and replaces all undated warranties and warranties dated before June 1, 2011.

In the U.S.: BERKELEY, 293 Wright St., Delavan, WI 53115

In Canada: 490 Pinebush Road, Unit 4, Cambridge, Ontario N1T 0A5

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